Photoshop 2: LRGB Processing & Tips and Tricks, by Don Selle


This Workshop covers more advanced PS topics and focuses on creating an Luminance, Red, Green and Blue (LRGB) image either by assembling color composite and luminance images or using a OSC image with a “synthetic” luminance layer

  • Why LRGB?
  • LRGB Workflow
  • Luminance layer edits and adjustments
  • Sharpening to bring out detail
  • Making your color pop
  • Using masks for local edits and adjustments
  • Gradient removal – Tips and Tools


Photoshop is a very broad and powerful program with many tools that can be used for almost any type of image processing.  The objective of Don’s Photoshop sessions is to give you a basic understanding of processing astro-images with Photoshop, and to highlight the Photoshop tools and techniques most commonly used to make your astrophotos pop.


Basic knowledge of image processing. Although not required, it will be helpful to already be familiar with how to perform basic functions with PhotoShop.

Daytime session (1 hour 30 minutes)

Monday, May 18, 2020, (3:15 – 4:45 PM)